I have created a 5 minute countdown and at the very end I have made the video open up with an alpha channel revealing the streamer. For obvious file size reasons I don't want to have to render the whole 5 minute video with an alpha channel to only be used at the very end. I noticed that you can create a playlist on the VLC media source but every time I use codecs with an alpha channel present the video looks super wack and terrible. So ideally I would have 99% of the video without an alpha channel and then OBS automatically plays the next video that has been rendered with an alpha channel. Hopefully that makes sense.